:root {
  --bg: #04060f;
  --fg: #e8f0ff;
  --accent: #46e0ff;
  --accent-2: #ff5db1;
  --panel: rgba(10, 16, 32, 0.72);
  --line: rgba(120, 180, 255, 0.18);
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--fg);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif; overflow: hidden; }

#stage { position: fixed; inset: 0; }
#vr-canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
#vr-svg { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }

/* Chapter title card */
#chapter-card {
  position: absolute; left: 50%; top: 12%; transform: translateX(-50%);
  text-align: center; pointer-events: none; text-shadow: 0 0 24px rgba(70, 224, 255, 0.55);
  opacity: 0; transition: opacity 0.8s ease;
}
#chapter-card.show { opacity: 1; }
#chapter-index { font-size: 0.85rem; letter-spacing: 0.5em; color: var(--accent); opacity: 0.75; }
#chapter-title { margin: 0.2em 0 0; font-size: clamp(1.8rem, 5vw, 3.4rem); font-weight: 700; }
#chapter-sub { margin: 0.3em 0 0; opacity: 0.7; font-size: 0.95rem; }

/* Director panel */
.panel {
  position: absolute; top: 16px; right: 16px; width: 264px; max-width: 84vw;
  background: var(--panel); backdrop-filter: blur(10px);
  border: 1px solid var(--line); border-radius: 14px; padding: 10px 12px;
  font-size: 0.8rem; z-index: 20; box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
}
.panel header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.panel header button { background: none; border: none; color: var(--fg); cursor: pointer; font-size: 1rem; }
.panel.collapsed .panel-body { display: none; }
.panel-body label { display: block; margin: 8px 0 2px; opacity: 0.85; }
.panel-body input[type="range"] { width: 100%; accent-color: var(--accent); }
.panel-body label.check { display: flex; gap: 6px; align-items: center; margin-top: 10px; }
.transport { display: flex; gap: 6px; }
.transport button {
  flex: 1; padding: 6px; background: rgba(70, 224, 255, 0.12); color: var(--fg);
  border: 1px solid var(--line); border-radius: 8px; cursor: pointer; font-size: 0.9rem;
}
.transport button:hover { background: rgba(70, 224, 255, 0.24); }
.acts { display: flex; flex-wrap: wrap; gap: 4px; margin: 8px 0; }
.acts button {
  font-size: 0.68rem; padding: 3px 6px; border-radius: 6px; cursor: pointer;
  background: rgba(255, 255, 255, 0.05); border: 1px solid var(--line); color: var(--fg);
}
.acts button.active { background: var(--accent); color: #04060f; font-weight: 700; }
.hud { margin-top: 10px; font-variant-numeric: tabular-nums; opacity: 0.7; font-size: 0.72rem; white-space: pre; }

/* Radial menu */
#vr-menu { position: absolute; inset: 0; z-index: 15; pointer-events: none; }
#vr-menu .menu-node {
  position: absolute; transform: translate(-50%, -50%); pointer-events: auto; cursor: pointer;
  padding: 7px 13px; border-radius: 999px; font-size: 0.78rem; letter-spacing: 0.06em;
  color: var(--fg); background: rgba(10, 20, 40, 0.55); border: 1px solid var(--line);
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease; white-space: nowrap;
  opacity: 0; animation: nodeIn 0.6s forwards;
}
#vr-menu .menu-node:hover {
  transform: translate(-50%, -50%) scale(1.18);
  background: rgba(70, 224, 255, 0.2);
  box-shadow: 0 0 22px rgba(70, 224, 255, 0.65), 0 0 44px rgba(255, 93, 177, 0.35);
}
@keyframes nodeIn { to { opacity: 1; } }

@media (max-width: 640px) {
  .panel { top: auto; bottom: 12px; right: 12px; left: 12px; width: auto; }
}